On-Again, Off-Again Couples In Hollywood

Are They Or Aren't They?

On-Again, Off-Again Couples gallery: Summer flings are in full swing in Hollywood, and once again Justin Bieber and Selena Gomez are reportedly giving it another go. The two were spotted together at mutual friend Alfredo Flores' birthday in Los Angeles on June 16. WATCH.

But these two certainly aren't the only exes to get back together. Here's seven celebrity couples that have been on-again, off-again, on-again so many times, it's hard to keep up!